Could you please help me? I have what i was told a 79 c4 transmission that pops out of park when running. I unhooked the linkage and it still wont stay in park if you touch it or shake the car. You also have to hold up on the shifter to get it to start. I was told it might be the parking paw. Anyone have any suggestions or links to how to replace it and where to get parts for it? I can get a c4 out of a 76 maverick thats bolted to the same engine as mine, but the problem with rmthat is it's...

1979 C4 Transmission Slips out of Park